Carbureter.



W. F. ROTHE. CRBURETER. APrLlcATlon msn MAY1.1912.

Patnted 'May 18, 1915,A

2 SHEETS-SHEET 1 EEEE A W. F, BOTHE. {PAREURETEK AFFMCM'IQNHLED HAYA.1912.

Patente May18, 1915.

winnaar rf. nomen, or msm sr. Louis, Immers.

y l`einen'trascinare .of the city of East St. Louis, in the county ofSt. Clair and State of Illinois, have invented a new and usefulImprovement in Carbureters, of which the lfollowing is 4a specification.

This invention relates to carbureters and more particularly liquid fuelcarbureters of the kind used in connection with internal combustion, orexplosion engines.

It has for its principal objects the production'of a simpie, eiiicientand easily adjusted device which gives a supply of liquid fuelproportionate to the inflow of-air and controlled by the openingandclosing of the throttle valve, and to attain certain other advantageshereinafter more fullv appearing.

The invention consistsin the parts and in the arrangements andcombinations of parts hereinafter described and claimed.

In the accompanying drawings, `which form. part of this specification,and where:T -11 like symbols refer to like parts wherever they occur,Figure 1 is a topplan View;

-Fig. 2 is a vertical section on the line y2 2 of Fig. 1; Fig. 3 is avertical section on the line 3 3 of Fig. 1, an elbow pipe and screenbeing applied to oneof the air intake opcnings'and the other openingbeing closed by a cover plate; Fig. 4 is a horizontal section on theline 4-4 .of Fig. 2; and Fig. 5

is a fragmentary perspective view of the 4reciprocatory block whichcarries the needlevalve, and the cam, whichcoperates therewith.

. .The carbureter shownfin the drawings .openings may be left open, .butin `Cold i weather one of the openings maybe closed opening.

by a cover plate 3 and an elbow or other pipe connection 4 will beattached .to the casing so as to communicate with the other The elbow 4will be connected to a pipe (not shown) leading from a place invproximity to the exhaust manifold or any portion of the enginewhichradiates heat suflicient -to heat the pipe and thereby heat theairbeforeit is taken into wthe carburet-er. These arrangementsareobvious. Therefore, they are not shownfin the drawings. The openingsflare preferably `cov- Speciflcation of Letters Iatent.

'Appueaupn area may 1, 1912. seriai m. 694,392.

Patented tray ia'ieis.

- ered by screens 5 of relatively 511e mesh 'sov as to prevent backfires and keep sand and dirt out of the engine.

The openings 2 communicate with air chambers 6. These air chambers 6 areconnected by a .cross passageway 7 and theyv circular diskthrottle-valve14 mounted on a I Arock-shaft 15. Thisrock-shaft isprovided i' at one end with an operating lever 16,:and has a cam oreccentric 17 fixed on its o ipposite end. The cam 17 is arranged withrespect to the,v'al`ve 14 so that when said valve is in closedjpositionAthe highest point4 of the cam is vertically below the rock-shaft. Aliquid inlet or passageway 181s ,provided in a nozzle member o'r plug19'secured in a boss 20 at the bottom Aof the extension 21 in which thecarbureting chamber 11 is located. The upper endv of thenozzle member 19is preferably made conical, as shown, so that the liquid may flow inalldirections from the mouth of the passageway 18.

The passageway 18 is controlled by a needle-valve 22 which is slidablyfitted in a vertical bore in the partition. wall 23. .The upper endportion of the needle-valve is screw-threaded, as at 24, and fitted in ascrew-threaded bore lin a reciprocatory block 25, which works inA avertical bore provided in a boss 26 at the 'top of the shell -1`. Thisblock 25 is preferably cylindricah as shown more clearly in Fig.` 5, andhas a portion out away, as at 2 to provide a shoulder 28 ada ted to bearagainst the cam 17 on the thrott e-valve shaft 15.

A spring 29 is sleeved over the needlevalve 22 and is placed undercompression' between the top of the partition wall -23 and end of theblock 25 so that itA acts to hold the block with its shoulder 28 incontact with thecam 17 continuously. Hence,

as vthe shaft 15 is rotated to openthe' throttle-vali-'e-and the highpoint of the cam moves vfrom under the shaft, thespring raisesthejblock25 .which in .turn'lfte the. A

ber, said last-mentioned passageway commumcating at one end with saidhorizontal pas r.isageway, and atfits opposite end with an upwardlyiar'inglmixing chamber, said carbureting chamber having an oil inlet atthe bottom thereof, a valve for controlling said oil inlet, an auxiliaryair chamber commu- Y nicating with said mixing' chamber above saidcarbureting chamber and. having an opening communicating with said spacebetween said outer and inner shells, a suction valve normally closingsaid opening, a throttle-valve controlling the flow `through saidcarbureter, and means controlled by said throttle-valve for opening andclosing said oil inlet valve simultaneously with and proportionately tothe opening and closing of said throttle-valve. v

3. A carbureter comprising an outer shell and an inner shellspacedtherefrom, said outer shell having an air intake opening therein,said inner shell having a horizontal transverse passageway communicating.at opposite ends with the space between said outer and inner shells, apassageway constituting a carburetingchamber, said lastmentionedpassageway communlcating at a one end with said hor1zontal transversepashaving an opening communicating with saidv air space between saidouter and inner shells, said opening being normally closed by anupwardly opening suctionavalve, a spring acting continuously tseat saidsuction valve, an auxiliary spring for said suction valve, saidauxiliary spring being inoper- Y"ative While the suction'valve isseated, and a throttle-valve for controlling the flow 4through saidcarbureter.

Signed atfSt. Louis, Missouri, this 27th day of April, 1912.

' WILLIAM F. RTHE.

Witnessesf G. A. PnNNINe'roN,

PAULINE AMBERG. i

